custom estimate fees action for cached fees

[holic]

currently we fetch+override fees in writeContract and sendTransaction (which recently lead to a bug and fixed in #3288)

instead, we could add an action override for estimateFeesPerGas that would cache/refresh these values and allow us to remove the manual overrides of args in writeContract/sendTransaction

[holic]

note that whatever uses this new may need to override the rest of the actions in the call stack (e.g. prepareTransactionRequest) due to the issue demonstrated in wevm/viem#2680 (comment)